Notice that 175 lines is a VERY short page (at 98 lpi that's not quite
2"). Your logging isn't turned up high enough for us to see which
lines are actually corrupt, but I would suspect that at least the last
line (#175) would be corrupt.

In this circumstance, I assume that some noise occurred on the line
that made the modem sense a carrier drop.

Yup. Lots of this is going to happen until the sender stops sending
page data. Unfortunately, if it happens for too long, then we'll hang
up (which is what happened in your case, but it also looked like the
sender hung up, too).

In other words, there was some line problem, or more likely, some
problem with the modulator on the sender or the demodulator on the
receiver, and so we got disconnected. If it is reproducible, then
worry about it more. Otherwise, ignore it if you can.